/Engine/Plugins/Animation/ControlRig/Source/ControlRig/Public/Rigs/RigHierarchy.h
Returns the default value to use for a pin for a control
The pin default value
[FString](API\Runtime\Core\Containers\FString) GetControlPinDefaultValue ( [FRigControlElement](API\Plugins\ControlRig\Rigs\FRigControlElement) * InControlElement, bool bForEdGraph, [ERigControlValueType](API\Plugins\ControlRig\Rigs\ERigControlValueType) InValueType ) const